Ship&#39;s propeller



Dec. 17, 1929. F. WISWEDEL SHIP'S PROPELLER Filed Aug. 28, 1928- Inventor fmawiwmeadv ww Attorney witnesses kumfiw Patented Dec. 17, 1929 SHIPS PRQPELLER Application filed August 28, 1928.

This invention relates to a new propelling mechanism for ships and it has for its object a better efficiency than that of the commonly used propelling by screw or paddle wheels,

and to avoid that the propelling means project from the hull of the ship.

These objects are obtained by an arrangement illustrated diagrammatically, by way of example, in the accompanying drawing in which 1- Fig. 1 shows a ships hull in rear elevation.

Fig. 2 shows in longitudinal section the propelling arrangement in a ships hull.

Fig. 3 shows the control of the driving mechanism.

Figs. 4 and 5 show in two views the expansion control.

Fig. 6 shows in rear elevation the propeller pipe.

Fig. 7 is a longitudinal section through the rear end of the propelling pipe with a reversing mechanism.

Fig. 8 is a cross section shortly before the rear end of the propelling pipe.

For propelling a ship several of the apparatus are used one of which will be hereinafter described.

They act in such a manner that regularly the water which flows into a propeller pipe open at the outer end is forced out by gas pressure, whereby the ship is propelled. The essential parts of the propelling device are a smooth propeller pipe B located in the ships hull A horizontally underneath the 35 water line, said propeller pipe being open at the rear endand closed at the front end so that it is permanently filled with water, and a pressure boiler R filled with compressed air, gas or explosion gases from an engine.

These gases flow through a shutting off valve a and a pipe 5 with three-way cock 0 into a large pipe B or through a pipe (Z into the atmosphere. The three-way cock 0 is reversed by the armature e of an electric device C, the exciting of the electromagnet being eifected, on the one hand, through a contact 7 which, by the pressure exerted by the gases flowing out at the end of pipe B against a plate g, is closed and, on the other hand, by a contact it closed by a float lifted Serial No. 302,536.

by the water flowing back into the pipe B. A dynamo machine generates'the working current.

For large size ships with propelling pipes of great diameter a freely movable piston is is preferably mounted in the propeller pipe B to separate the gas from the water and to prevent escaping of. the gas above the water. I I

At the ends of the propeller pipe B control levers Z are arranged the downwardly direct-ed arm m of which projects into the pipe B to be reversed by the piston is. A connecting rod n connecting the two levers Z effects a mutual reversing. Stops 0 at the 0; free end of the pipe B limit the stroke of the piston is.

For working with expansion of compressed driving gases a. valve p is mounted in the pipe 5 and operated by the armature g of (0 an electric device E and by a counter spring 1. The releasing is effected by the contact f of a float device 25 which, similar to the float i, communicates with the propeller pipe B by tubes u. i

According to the degree of the expansion several such floator contact-devices may be mounted on the pipe B, for example at every half, quarter or eighth length of the pipe from the closed end of the same. The ap- S0 paratus for a certain expansion is switched in by the closing of the circuit in interrupting simultaneously the circuits for the outer apparatus. I

The invention consists of the novel con- 8 struction, combination and arrangement of the parts as above more specifically described and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

I claim 1. A propelling mechanism for ships, consisting in the combination of propeller pipes open at the outer end mounted horizontally in the ships hull underneath the water line, reservoirs containing gas or air under presv sure, pipe conduits connecting said reservoirs to said propeller pipes, valves in said pipe conduits adapted to be reversed, electrically operated changeover switches for said valves, and releasing contacts at both ends of said propeller pipes for controlling said changeover switches.

2. A propelling mechanism for ships, consisting in the combination ofpropeller pipes open at the outer end mounted horizontally in the ships hull underneath the Water line, reservoirs containing gas or air under pressure, pipe conduits connecting said reservoirs to said propeller pipes, valves in said pipe conduits adapted to be reversed, a piston movably inserted in each of said propeller pipes, stops at the free end of each propeller pipe for limiting the stroke of the corresponding piston, two-armed control levers, one at each end of each propeller pipe the downwardly directed arm of each control lever projecting into said propeller pipe to be operated by said piston, and rods connecting said control levers with said valves.

3. A propelling mechanism for ships, consisting in the combination of propeller pipes open at the outer end mounted. horizontally in the ships hull underneath the Water line, reservoirs containing gas or air under pressure, pipe conduits connecting said reservoirs 3 to said propeller pipes, valves in said pipe conduits adapted to be reversed, means for reversing said valves operated by the changing gas and Water pressure, float boxes at the sides of each propeller pipe, a float in each float box, releasing contacts for said rovers ing means operated by said floats, and con necting tubes for connecting said float-boxes at the top and bottom to the corresponding propeller pipe.

In testimony whereof I affix my signature.

FRIEDRICH WISWEDEL. 

